Apart from light weighting effects and very low barrier properties against liquids or gases, paper packaging has many benefits. It is known as sustainable raw material with high stiffness and strength properties in the packaging industry. Since a long time, people are trying to modify paper properties to match market requirements, e.g. adding sizing to achieve proper water resistance.
With upcoming discussions about regulatory issues, health concerns and limited recyclability, brand owners and the packaging industry itself tries to replace extrusion coated polymer packaging and flour chemical treated packaging papers with other solutions.
This presentation will show some insights into a newly developed barrier solution concept, by using a sustainable raw material which can be produced at reasonable quantities and costs.
The interest to use micro- or nano fibrillated materials, raised quite significantly over the last years. Several studies showed the barrier potential of this material against oxygen or oil and grease barrier already. Most of the MFC coatings have only been applied on a laboratory scale so far.
After successful laboratory trials this concept was proven at the wet-end of a paper machine at a pilot scale to evaluate the continuous application of different MFC grades with coat weights between 7 g/m2 and 15 g/m2 on a 40 g/m2 base paper. In addition, the effect of calcium carbonate was evaluated by adding a mass fraction of up to 20% to the MFC.
The results of the pilot trial prove the feasibility of a continuous application of MFC on paper to generate an oil and grease resistant paper.